22040043202421 has 4 divisors (see below), whose sum is σ = 22040837437344. Its totient is φ = 22039248967500.

The previous prime is 22040043202403. The next prime is 22040043202423. The reversal of 22040043202421 is 12420234004022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22040043202421 - 2²⁶ = 22039976093557 is a prime.

It is a super-2 number, since 2×22040043202421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22040043202423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397075835 + ... + 397131336.

It is an arithmetic number, because the mean of its divisors is an integer number (5510209359336).

Almost surely, 2^{22040043202421} is an apocalyptic number.

It is an amenable number.

22040043202421 is a deficient number, since it is larger than the sum of its proper divisors (794234923).

22040043202421 is an equidigital number, since it uses as much as digits as its factorization.

22040043202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794234922.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 22040043202421 its reverse (12420234004022), we get a palindrome (34460277206443).

The spelling of 22040043202421 in words is "twenty-two trillion, forty billion, forty-three million, two hundred two thousand, four hundred twenty-one".